package com.ipan.kits.time;

import java.lang.management.ManagementFactory;
import java.util.Calendar;
import java.util.Date;

import org.apache.commons.lang3.Validate;
import org.apache.commons.lang3.time.DateUtils;

import com.ipan.kits.base.annotation.NotNull;

/**
 * 日期工具类.
 * 
 * 在不方便使用joda-time时，使用本类降低Date处理的复杂度与性能消耗, 封装Common Lang及移植Jodd的最常用日期方法
 */
public class DateUtil {

	public static final long MILLIS_PER_SECOND = 1000; // Number of milliseconds
														// in a standard second.
	public static final long MILLIS_PER_MINUTE = 60 * MILLIS_PER_SECOND; // Number
																			// of
																			// milliseconds
																			// in
																			// a
																			// standard
																			// minute.
	public static final long MILLIS_PER_HOUR = 60 * MILLIS_PER_MINUTE; // Number
																		// of
																		// milliseconds
																		// in a
																		// standard
																		// hour.
	public static final long MILLIS_PER_DAY = 24 * MILLIS_PER_HOUR; // Number of
																	// milliseconds
																	// in a
																	// standard
																	// day.

	private static final int[] MONTH_LENGTH = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

	//////// 日期比较 ///////////
	/**
	 * 是否同一天.
	 * 
	 * @see DateUtils#isSameDay(Date, Date)
	 */
	public static boolean isSameDay(@NotNull final Date date1, @NotNull final Date date2) {
		return DateUtils.isSameDay(date1, date2);
	}

	/**
	 * 是否同一时刻.
	 */
	public static boolean isSameTime(@NotNull final Date date1, @NotNull final Date date2) {
		// date.getMillisOf() 比date.getTime()快
		return date1.compareTo(date2) == 0;
	}

	/**
	 * 判断日期是否在范围内，包含相等的日期
	 */
	public static boolean isBetween(@NotNull final Date date, @NotNull final Date start, @NotNull final Date end) {
		if (date == null || start == null || end == null || start.after(end)) {
			throw new IllegalArgumentException("some date parameters is null or dateBein after dateEnd");
		}
		return !date.before(start) && !date.after(end);
	}

	//////////// 往前往后滚动时间//////////////

	/**
	 * 加一月
	 */
	public static Date addMonths(@NotNull final Date date, int amount) {
		return DateUtils.addMonths(date, amount);
	}

	/**
	 * 减一月
	 */
	public static Date subMonths(@NotNull final Date date, int amount) {
		return DateUtils.addMonths(date, -amount);
	}

	/**
	 * 加一周
	 */
	public static Date addWeeks(@NotNull final Date date, int amount) {
		return DateUtils.addWeeks(date, amount);
	}

	/**
	 * 减一周
	 */
	public static Date subWeeks(@NotNull final Date date, int amount) {
		return DateUtils.addWeeks(date, -amount);
	}

	/**
	 * 加一天
	 */
	public static Date addDays(@NotNull final Date date, final int amount) {
		return DateUtils.addDays(date, amount);
	}

	/**
	 * 减一天
	 */
	public static Date subDays(@NotNull final Date date, int amount) {
		return DateUtils.addDays(date, -amount);
	}

	/**
	 * 加一小时
	 */
	public static Date addHours(@NotNull final Date date, int amount) {
		return DateUtils.addHours(date, amount);
	}

	/**
	 * 减一小时
	 */
	public static Date subHours(@NotNull final Date date, int amount) {
		return DateUtils.addHours(date, -amount);
	}

	/**
	 * 加一分钟
	 */
	public static Date addMinutes(@NotNull final Date date, int amount) {
		return DateUtils.addMinutes(date, amount);
	}

	/**
	 * 减一分钟
	 */
	public static Date subMinutes(@NotNull final Date date, int amount) {
		return DateUtils.addMinutes(date, -amount);
	}

	/**
	 * 终于到了，续一秒.
	 */
	public static Date addSeconds(@NotNull final Date date, int amount) {
		return DateUtils.addSeconds(date, amount);
	}

	/**
	 * 减一秒.
	 */
	public static Date subSeconds(@NotNull final Date date, int amount) {
		return DateUtils.addSeconds(date, -amount);
	}

	//////////// 直接设置时间//////////////

	/**
	 * 设置年份, 公元纪年.
	 */
	public static Date setYears(@NotNull final Date date, int amount) {
		return DateUtils.setYears(date, amount);
	}

	/**
	 * 设置月份, 1-12.
	 */
	public static Date setMonths(@NotNull final Date date, int amount) {
		if (amount < 1 || amount > 12) {
			throw new IllegalArgumentException("monthOfYear must be in the range[ 1, 12]");
		}
		return DateUtils.setMonths(date, amount - 1);
	}

	/**
	 * 设置日期, 1-31.
	 */
	public static Date setDays(@NotNull final Date date, int amount) {
		return DateUtils.setDays(date, amount);
	}

	/**
	 * 设置小时, 0-23.
	 */
	public static Date setHours(@NotNull final Date date, int amount) {
		return DateUtils.setHours(date, amount);
	}

	/**
	 * 设置分钟, 0-59.
	 */
	public static Date setMinutes(@NotNull final Date date, int amount) {
		return DateUtils.setMinutes(date, amount);
	}

	/**
	 * 设置秒, 0-59.
	 */
	public static Date setSeconds(@NotNull final Date date, int amount) {
		return DateUtils.setSeconds(date, amount);
	}

	/**
	 * 设置毫秒.
	 */
	public static Date setMilliseconds(@NotNull final Date date, int amount) {
		return DateUtils.setMilliseconds(date, amount);
	}

	///// 获取日期的位置//////

	public static int getThisYear() {
		return Calendar.getInstance().get(Calendar.YEAR);
	}

	/**
	 * 获得日期是一周的第几天. 已改为中国习惯，1 是Monday，而不是Sundays.
	 */
	public static int getDayOfWeek(@NotNull final Date date) {
		int result = getWithMondayFirst(date, Calendar.DAY_OF_WEEK);
		return result == 1 ? 7 : result - 1;
	}

	/**
	 * 获得日期是一年的第几天，返回值从1开始
	 */
	public static int getDayOfYear(@NotNull final Date date) {
		return get(date, Calendar.DAY_OF_YEAR);
	}

	/**
	 * 获得日期是一月的第几周，返回值从1开始.
	 * 
	 * 开始的一周，只要有一天在那个月里都算. 已改为中国习惯，1 是Monday，而不是Sunday
	 */
	public static int getWeekOfMonth(@NotNull final Date date) {
		return getWithMondayFirst(date, Calendar.WEEK_OF_MONTH);
	}

	/**
	 * 获得日期是一年的第几周，返回值从1开始.
	 * 
	 * 开始的一周，只要有一天在那一年里都算.已改为中国习惯，1 是Monday，而不是Sunday
	 */
	public static int getWeekOfYear(@NotNull final Date date) {
		return getWithMondayFirst(date, Calendar.WEEK_OF_YEAR);
	}

	private static int get(final Date date, int field) {
		Validate.notNull(date, "The date must not be null");
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);

		return cal.get(field);
	}

	private static int getWithMondayFirst(final Date date, int field) {
		Validate.notNull(date, "The date must not be null");
		Calendar cal = Calendar.getInstance();
		cal.setFirstDayOfWeek(Calendar.MONDAY);
		cal.setTime(date);
		return cal.get(field);
	}

	///// 获得往前往后的日期//////

	/**
	 * 2016-11-10 07:33:23, 则返回2016-1-1 00:00:00
	 */
	public static Date beginOfYear(@NotNull final Date date) {
		return DateUtils.truncate(date, Calendar.YEAR);
	}

	/**
	 * 2016-11-10 07:33:23, 则返回2016-12-31 23:59:59.999
	 */
	public static Date endOfYear(@NotNull final Date date) {
		return new Date(nextYear(date).getTime() - 1);
	}

	/**
	 * 2016-11-10 07:33:23, 则返回2017-1-1 00:00:00
	 */
	public static Date nextYear(@NotNull final Date date) {
		return DateUtils.ceiling(date, Calendar.YEAR);
	}

	/**
	 * 2016-11-10 07:33:23, 则返回2016-11-1 00:00:00
	 */
	public static Date beginOfMonth(@NotNull final Date date) {
		return DateUtils.truncate(date, Calendar.MONTH);
	}

	/**
	 * 2016-11-10 07:33:23, 则返回2016-11-30 23:59:59.999
	 */
	public static Date endOfMonth(@NotNull final Date date) {
		return new Date(nextMonth(date).getTime() - 1);
	}

	/**
	 * 2016-11-10 07:33:23, 则返回2016-12-1 00:00:00
	 */
	public static Date nextMonth(@NotNull final Date date) {
		return DateUtils.ceiling(date, Calendar.MONTH);
	}

	/**
	 * 2017-1-20 07:33:23, 则返回2017-1-16 00:00:00
	 */
	public static Date beginOfWeek(@NotNull final Date date) {
		return DateUtils.truncate(DateUtil.subDays(date, DateUtil.getDayOfWeek(date) - 1), Calendar.DATE);
	}

	/**
	 * 2017-1-20 07:33:23, 则返回2017-1-22 23:59:59.999
	 */
	public static Date endOfWeek(@NotNull final Date date) {
		return new Date(nextWeek(date).getTime() - 1);
	}

	/**
	 * 2017-1-23 07:33:23, 则返回2017-1-22 00:00:00
	 */
	public static Date nextWeek(@NotNull final Date date) {
		return DateUtils.truncate(DateUtil.addDays(date, 8 - DateUtil.getDayOfWeek(date)), Calendar.DATE);
	}

	/**
	 * 2016-11-10 07:33:23, 则返回2016-11-10 00:00:00
	 */
	public static Date beginOfDate(@NotNull final Date date) {
		return DateUtils.truncate(date, Calendar.DATE);
	}

	/**
	 * 2017-1-23 07:33:23, 则返回2017-1-23 23:59:59.999
	 */
	public static Date endOfDate(@NotNull final Date date) {
		return new Date(nextDate(date).getTime() - 1);
	}

	/**
	 * 2016-11-10 07:33:23, 则返回2016-11-11 00:00:00
	 */
	public static Date nextDate(@NotNull final Date date) {
		return DateUtils.ceiling(date, Calendar.DATE);
	}

	/**
	 * 2016-12-10 07:33:23, 则返回2016-12-10 07:00:00
	 */
	public static Date beginOfHour(@NotNull final Date date) {
		return DateUtils.truncate(date, Calendar.HOUR_OF_DAY);
	}

	/**
	 * 2017-1-23 07:33:23, 则返回2017-1-23 07:59:59.999
	 */
	public static Date endOfHour(@NotNull final Date date) {
		return new Date(nextHour(date).getTime() - 1);
	}

	/**
	 * 2016-12-10 07:33:23, 则返回2016-12-10 08:00:00
	 */
	public static Date nextHour(@NotNull final Date date) {
		return DateUtils.ceiling(date, Calendar.HOUR_OF_DAY);
	}

	/**
	 * 2016-12-10 07:33:23, 则返回2016-12-10 07:33:00
	 */
	public static Date beginOfMinute(@NotNull final Date date) {
		return DateUtils.truncate(date, Calendar.MINUTE);
	}

	/**
	 * 2017-1-23 07:33:23, 则返回2017-1-23 07:33:59.999
	 */
	public static Date endOfMinute(@NotNull final Date date) {
		return new Date(nextMinute(date).getTime() - 1);
	}

	/**
	 * 2016-12-10 07:33:23, 则返回2016-12-10 07:34:00
	 */
	public static Date nextMinute(@NotNull final Date date) {
		return DateUtils.ceiling(date, Calendar.MINUTE);
	}

	////// 闰年及每月天数///////
	/**
	 * 是否闰年.
	 */
	public static boolean isLeapYear(@NotNull final Date date) {
		return isLeapYear(get(date, Calendar.YEAR));
	}

	/**
	 * 是否闰年，copy from Jodd Core的TimeUtil
	 * 
	 * 参数是公元计数, 如2016
	 */
	public static boolean isLeapYear(int y) {
		boolean result = false;

		if (((y % 4) == 0) && // must be divisible by 4...
				((y < 1582) || // and either before reform year...
						((y % 100) != 0) || // or not a century...
						((y % 400) == 0))) { // or a multiple of 400...
			result = true; // for leap year.
		}
		return result;
	}

	/**
	 * 获取某个月有多少天, 考虑闰年等因数, 移植Jodd Core的TimeUtil
	 */
	public static int getMonthLength(@NotNull final Date date) {
		int year = get(date, Calendar.YEAR);
		int month = get(date, Calendar.MONTH);
		return getMonthLength(year, month);
	}

	/**
	 * 获取某个月有多少天, 考虑闰年等因数, 移植Jodd Core的TimeUtil
	 */
	public static int getMonthLength(int year, int month) {

		if ((month < 1) || (month > 12)) {
			throw new IllegalArgumentException("Invalid month: " + month);
		}
		if (month == 2) {
			return isLeapYear(year) ? 29 : 28;
		}

		return MONTH_LENGTH[month];
	}

	// -- 来自ruoyi --//
	/**
     * 获取当前Date型日期
     * 
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     * 
     * @return String
     */
    public static String getDate()
    {
        return DateFormatUtil.formatDate("yyyy-MM-dd", new Date());
    }

    public static final String getTime()
    {
        return DateFormatUtil.formatDate("yyyy-MM-dd HH:mm:ss", new Date());
    }
	/**
	 * 获取服务器启动时间
	 */
	public static Date getServerStartDate() {
		long time = ManagementFactory.getRuntimeMXBean().getStartTime();
		return new Date(time);
	}

	/**
	 * 计算相差天数
	 */
	public static int differentDaysByMillisecond(Date date1, Date date2) {
		return Math.abs((int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24)));
	}

	/**
	 * 计算两个时间差
	 */
	public static String getDatePoor(Date endDate, Date nowDate) {
		long nd = 1000 * 24 * 60 * 60;
		long nh = 1000 * 60 * 60;
		long nm = 1000 * 60;
		// long ns = 1000;
		// 获得两个时间的毫秒时间差异
		long diff = endDate.getTime() - nowDate.getTime();
		// 计算差多少天
		long day = diff / nd;
		// 计算差多少小时
		long hour = diff % nd / nh;
		// 计算差多少分钟
		long min = diff % nd % nh / nm;
		// 计算差多少秒//输出结果
		// long sec = diff % nd % nh % nm / ns;
		return day + "天" + hour + "小时" + min + "分钟";
	}

}
